Light distribution lens of landscape lamp using integrated plane light-emitting diode (LED) as light source

Abstract

The invention discloses a light distribution lens of a landscape lamp using an integrated plane light-emitting diode (LED) as a light source. The integrated plane LED light source is installed on a base and uses the light distribution lens matched with the integrated plane LED light source, and the lens comprises sunken cambered surfaces symmetrical relative to an optical axis, a first light distribution cambered surface and a second light distribution cambered surface. The sunken cambered surfaces are located at the bottom of the lens and connected with the second light distribution cambered surface and the base. The first light distribution cambered surface distributes light emitted by a corresponding LED light source into evenly-distributed light. The second light distribution cambered surface is used for performing secondary light distribution to the light obtained by the first light distribution cambered surface to form light fields distributed along the ground irradiation surface in a rectangular mode. The lens enables the light which is emitted by the integrated plane LED light source or a single barrel-shaped LED and has Lambert distribution characteristics to form rectangular intensity distribution along the ground, light source application rang is wide, the combination is convenient, and multiple light sources are combined to be used for illumination, thereby improving light utilization rate, achieving even illumination intensity of the irradiation surface for courtyard, park and passageway illumination and increasing illumination intensity for landscapes.

Description

technical field [0001] The invention relates to the non-imaging optical technology of LED lighting, and more specifically, relates to a light distribution lens of a landscape lamp with an integrated flat LED as a light source, which is used for large-area illumination of landscapes. Background technique [0002] The development of LED (Light Emitting Diode, light-emitting diode) technology has opened up a new era of lighting technology. Because LED has many advantages such as small size, long life, high photoelectric efficiency, environmental protection and energy saving, LED street lighting technology has developed rapidly in recent years. Since the radiation angle distribution of most LED light sources is a Lambertian distribution (Lambertian distribution) of 110 degrees to 120 degrees, if there is no light distribution, although the range of illumination on the ground is relatively wide, there is a gap between the illuminance at the edge and the illuminance at the center ...

AI Technical Summary

Problems solved by technology

Since the radiation angle distribution of most LED light sources is a Lambertian distribution (Lambertian distribution) of 110 degrees to 120 degrees, if there is no light distribution, although the range of illumination on the ground is relatively wide, there is a gap between the illuminance at the edge and the illuminance at the center Too large, the distribution is very uneven, a lot of light can be concentrated in the center of the lighting area, but good landscape lighting requires uniform lighting, and the illuminance in the designated area can reach a certain level

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